$BC2B/48171: Check Sign of FAC#1
Jump from $A79F, $B9EA, $BC39, $BC65, $E097:
BC2B: A5 61 LDA $61 ; FAC Exponent
BC2D: F0 09 BEQ $BC38
Jump from $BC6B:
BC2F: A5 66 LDA $66 ; FAC Sign
Jump from $BC98:
BC31: 2A ROL
BC32: A9 FF LDA #$FF
BC34: B0 02 BCS $BC38
BC36: A9 01 LDA #$01
Jump from $BC2D, $BC34:
BC38: 60 RTS
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